Add implicit license agreement for contributions to the project.
Merge pull request #207 from CUTR-at-USF/contributeLicense

Add implicit license agreement for contributions to the project
update development requirements
Add TWSReleaseNotesView
update gitignore to ignore Xcode checkout files
Update project to remove unneeded files
Add a helper class to handle displaying the release notes view and wire it up in the App Delegate
Minor change to how we determine if it's a new release and add notes describing why I changed it.
Update credits
Merge remote-tracking branch 'upstream/master' into issue_216
Merge pull request #219 from aaronbrethorst/issue_216

Issue 216
Merge remote-tracking branch 'upstream/master' into develop
Merge remote-tracking branch 'upstream/develop' into develop
Hoist the key we use in the Info.plist file into a constant NSString, and ensure that it is used everywhere in the file in order to prevent the release notes from popping up on every app launch
Merge pull request #220 from aaronbrethorst/release_notes_view_bug_fixes

Release notes view bug fixes
update changelog
Merge pull request #198 from bbodenmiller/changelog

WIP: 2.1 changelog updates
Merge pull request #199 from bbodenmiller/patch-1

update development requirements